Klarseal Verified Customer Reviews (2026)

What is Klarseal?

Klarseal provides code-signing certificates for developers and businesses that are involved in the distribution of Windows applications, drivers, or installers. They offer both Standard (OV) and Extended Validation (EV) certificates issued by Certum and include services for managing orders, invoices, application assessments, and real-time status updates. By employing cloud signing, these certificates ensure the private key is generated and securely housed within the certificate authority's hardware security module, rather than being stored on a USB token. The Extended Validation option requires more rigorous identity verification steps and is essential for developers who wish to create an account in the Windows Hardware Developer Program to submit kernel drivers. Furthermore, Klarseal provides free tools like Sign my app, an MIT-licensed plugin that enables compatible AI coding agents to facilitate Windows-file signing for user approval, as well as Sign my app for Windows, a utility that verifies and digitally signs .exe, .dll, and .msi files, streamlining the development process. This extensive range of tools not only makes the signing process more straightforward but also significantly boosts security and compliance for software distribution, ultimately benefiting developers and their end users. Additionally, Klarseal's commitment to improving the developer experience demonstrates their awareness of the evolving needs in software security and distribution.